removed "partition by extrusion" code: it's not used anymore

Common/DefaultOptions.h

Common/Options.cpp

Common/Options.h

Geo/ExtrudeParams.cpp

Geo/ExtrudeParams.h

Mesh/BoundaryLayers.cpp

Mesh/meshGEdgeExtruded.cpp

Mesh/meshGFaceDelaunayInsertion.cpp

Mesh/meshGFaceExtruded.cpp

Mesh/meshGRegionExtruded.cpp

Mesh/meshPartition.cpp

Mesh/meshPartitionOptions.cpp

Mesh/meshPartitionOptions.h

Plugin/ModifyComponent.cpp

benchmarks/stl/mobilette.geo